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- The dog kept a vigilant guard over the house. 这只狗警惕地守护着这所房屋。
- He urged them to guard against conceit. 他要求他们防止骄傲自满。
- He bribed his way past the guard and escaped. 他买通看守而逃之夭夭了。
- I was off my guard and made no suitable reply. 我没提防，因此没有作出适当的回答。
- The guard of honor headed up the whole parade. 仪仗队走在游行队伍的最前头。
- A red light is usually a signal of danger. 红灯通常是危险的信号。
- Please guard against pickpockets on the bus. 在公共汽车上要谨防扒手。
- The soldier volunteered for guard duty. 那个战士自告奋勇去站岗。
- The guard had orders to shoot on sight. 哨兵奉命见人就开枪。
- I stood watching for the signal to change to green. 我站着等待交通信号转为绿灯。
- Each guarding signals can be input to the corresponding wall rack for concentrative guarding. 各告警信号可输入到本架进行集中告警；
- Be on your guard, I conjure you. 千万要警惕呀，我恳求你。
- Let's set the clock by the radio time signal. 咱们照着收音机的报时信号把钟对一对。
- Four soldiers stood guard over the coffin. 四个士兵守卫灵柩。
- The guard should be watchful during the night. 警卫在黑夜里也应该警醒。
- A red lamp is often a danger signal. 红灯常常是危险的信号。
- The guard was killed with a high-powered rifle. 那卫兵被杀伤力大的火枪击毙了。
- A reflected signal on a communication channel. 一种在通信信道上反射回来的信号。
- The threat from the Revolutionary Guards signalled that the powerful conservative force could intervene directly to end the political crisis. 来自伊朗革命卫队的威胁表明，为了结束此次政治危机，势力强大的保守力量有可能直接介入。
- The rise in prices was a signal for rebellion. 物价上涨引起了叛乱。
